in indiana or anywhere in the united states. you have a person come from indiana and come to guam and say this feels like i'm a country because of so many people moving back and forth across the pacific have made their way to guam. has all these influences. it's hard for guam to figure out what it is. >> reporter: while it has the biggest k-mart in the world and guamians are u.s. citizens they cannot actually vote in federally lexes. that's because guam is one of 14 u.s. territories, like alaska and hawaii were before they became states. only guam never made it that far. >> guam you have to say i'm from guam usa to kind of assert. i'm part of the united states. >> reporter: the japannese military invaded guam in world war ii, but now a new generation of japannese has returned. a million a year armed with cash and credit cards to shop, basque in the sunshine and play in guam's krystal clear waters. while tourist dollars support the island's economy, an unwelcome outsider is undermining its eco system. the poisonous brown tree sna